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Thread: Seeking advice from all the wise ones ....yet again :-)

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    Ausphotography Regular ktoopi's Avatar
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    Seeking advice from all the wise ones ....yet again :-)

    Hi all
    ............I have a brand new Canon 70-200 2.8 IS USM mk 2 and I can't seem to get it to auto focus when attached to my 5diii. I can manual focus no problem and the auto focus works perfectly when the new lens is attached to my 7d. I have been through all the camera menus looking for a setting that I perhaps have accidently changed but I can't figure out the problem. All my other lenses work perfectly when attached to the 5diii

    any suggestions most appreciated

    cheers Karen
    Canon 5diii; Canon 7D; Canon 3.5 15-85mm IS USM; Canon 4-5.6 70-300mm IS USM; Canon 1.4 50mm , Canon Macro 100mm 2.8 L IS USM, Canon 35mm 1.4 L USM, Canon 24-105mm L IS USM, CPL and UV filters, manfrotto tripod and Lowepro backpack plus dreams for so much more!!


  2. #2
    http://steveaxford.smugmug.com/ Steve Axford's Avatar
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    I'm unaware of any setting that could cause that. You could try cleaning the contacts (both camera and lens) with some alcohol. If that doesn't work then call Canon and explain the problem to them.

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    Member Birdman's Avatar
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    I had a Sigma 150-500mm Lens that would not autofocus when on my Canon Camera it just kept on seeking, eventually i took it back to the shop and it went in for warranty repair, now works like a charm. Maybe there is some sort of calibration issue when hooked into the 5DIII(not sure how the lenses communicate with cameras)
    Last edited by Birdman; 01-12-2014 at 9:10am.
    http://www.danielakininphotography.com
    Canon 5D MKIII, Fujifilm FinePix X100S
    Canon EF 50mm f/1.8 II
    Canon EF 17-40mm f/4L USM
    Canon EF 24-105 mm f/4L USM
    Sigma 150-500mm f/5-6.3 APO DG OS HSM
    Sigma 105mm F2.8 EX DG OS HSM

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